Abstract: A clear span building structure includes a first row of cantilever supporting structures and a second opposing row of cantilever supporting structures. Each of the cantilever supporting structures has (1) a post with a top end and a bottom end, the bottom end being engaged to the ground; (2) an anchor span having a haunch height from a bottom end of the anchor span to the ground; and (3) a cantilever span. The anchor span and the cantilever span are coupled to the top end of the post. The anchor span slopes downwards from the top end of the post and the cantilever span slopes upwards from the top end of the post. A first roof covers the first row of cantilever supporting structures. A second roof covers the second opposing row of cantilever supporting structures. The first row of cantilever supporting structures and the second opposing row of cantilever supporting structures form only two pole lines.